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27-acre reservoir near Kalāheo. The lake tops out around 30 ft. The contours come from a model of the real basin shape and its known max depth. Read them as probabilities, not soundings, and keep them out of navigation decisions. Here's the year, species by species, as the scoring engine sees it.
On the chart, Halenanahu Reservoir draws 27 acres inside 1.7 miles of shoreline. A development index of 2.4 means a maze of bays and points: far more casting targets than a round bowl of the same size. 43% of the surface is littoral (under ~15 ft), per the model — cover, weeds and forage water. Call it 0.4 mi long by 0.3 mi wide at the broadest reach. The water lies in Kauai County. Closest neighbour on DepthScout: Mauka Reservoir, 3 mi southwest of here.
Spring puts largemouth bass in skinny water — 2 to 10 ft is the zone. As the season builds they drop to 8 to 20 ft, wintering in 9 to 30 ft. Spring largemouth bass concentrate at Shallow bay flat, a prime-rated weed flat around 4 ft. Warm-month bites cluster around early morning and the evening. A texas-rigged 10" worm or a deep-diving crankbait covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dawn & dusk | Shallow bay flat (4 ft) | Spinnerbait, Chatterbait |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (14 ft) | Texas-rigged 10" worm, Deep-diving crankbait |
| Fall | 4 to 15 ft | midday & dawn | Main-lake point (8 ft) | Squarebill crankbait (shad), Spinnerbait |
| Winter | 9 to 30 ft | midday | Break off the point (14 ft) | Blade bait, Jigging spoon |
Spring puts peacock bass (tucunaré) in skinny water — 2 to 12 ft is the zone. Warm water sends them out to 3 to 15 ft; cold water stacks them in 6 to 22 ft. Main-lake point is the standout, a point at roughly 8 ft, rated prime for spring peacock bass (tucunaré). Plan around midday and early morning in the warm months. A topwater (walking bait) or a jerkbait covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 12 ft | midday & dawn | Main-lake point (8 ft) | Topwater prop bait, Jerkbait (fire tiger) |
| Summer | 3 to 15 ft | midday & dawn | Main-lake point (8 ft) | Topwater (walking bait), Jerkbait |
| Fall | 3 to 15 ft | midday & dawn | Main-lake point (8 ft) | Jerkbait, Swimbait |
| Winter | 6 to 22 ft | midday | Break off the point (14 ft) | Slow jerkbait, Jig |
Spring puts channel catfish in skinny water — 3 to 12 ft is the zone. As the season builds they drop to 8 to 25 ft, wintering in 9 to 30 ft. Winter channel catfish concentrate at Deep basin, a prime-rated deep basin around 26 ft. Warm-month bites cluster around after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | dusk | Shallow bay flat (4 ft) | |
| Summer | 8 to 25 ft | night & dusk | Deep basin (26 ft) | |
| Fall | 10 to 30 ft | dusk | Deep basin (26 ft) | |
| Winter | 9 to 30 ft | midday | Deep basin (26 ft) |
Start shallow in spring: bluegill sit in 1 to 6 ft that time of year. Summer pushes them deeper, 4 to 15 ft, and winter fish settle into 10 to 25 ft. The spot to know is Shallow bay flat, a weed flat in about 4 ft of water that rates prime for bluegill in spring. Warm-month bites cluster around early morning and the evening. Throw a small sponge spider (fly) or a micro tube jig until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (4 ft) | 1/32 oz jig + micro plastic, Tiny popper (evenings) |
| Summer | 4 to 15 ft | dawn & dusk | Shallow bay flat (4 ft) | Small sponge spider (fly), Micro tube jig |
| Fall | 6 to 18 ft | midday | Break off the point (14 ft) | Micro jig + waxworm, Small spoon tipped |
| Winter | 10 to 25 ft | midday | Deep basin (26 ft) | Tiny spoon |
In spring, tilapia run shallow here, mostly 1 to 6 ft. Summer pushes them deeper, 2 to 10 ft, and winter fish settle into 5 to 18 ft. Shallow bay flat is the standout, a weed flat at roughly 4 ft, rated prime for spring tilapia. Time it for midday and early morning. You won't need more than a micro-jig near weed edges most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft | midday & dusk | Shallow bay flat (4 ft) | Tiny jig + bread-ball tip, Small worm under float |
| Summer | 2 to 10 ft | midday & dawn | Shallow bay flat (4 ft) | Micro-jig near weed edges |
| Fall | 3 to 12 ft | midday | Shallow bay flat (4 ft) | Small jig tipped with worm |
| Winter | 5 to 18 ft | midday | Break off the point (14 ft) | Slow micro-jig, warm outflows |
4 pieces of structure are mapped here — Deep basin, around 26 ft, is the deepest of them.
Season dates, license requirements, and size and bag limits for Hawaii waters are set by the Hawaii DLNR — and special regulations can apply to Halenanahu Reservoir specifically, so confirm the current rules before you fish.
Check the official Hawaii fishing regulations →
Halenanahu Reservoir is about 30 ft (9 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target largemouth bass, peacock bass (tucunaré), channel catfish, bluegill, tilapia on Halenanahu Reservoir.
Shallow bay flat is the top-rated area: a weed flat in about 4 ft of water that rates prime for largemouth bass in spring. Every other rated spot, per species and season, is on the map above.
For largemouth bass, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Halenanahu Reservoir is regulated by the Hawaii DLNR. Check the official Hawaii regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Mauka Reservoir 3 mi · Waita Reservoir 4 mi · Kapaia Reservoir 4 mi · Aepo Reservoir 5 mi · Aepoeha Reservoir 6 mi · Alexander Reservoir 6 mi · Wailua Reservoir 7 mi · Ipuolono Reservoir 7 mi · Kalihiwai Reservoir 15 mi · Puu Ka Ele Reservoir 15 mi · Waiakalua Reservoir 17 mi · Puʻu Lua Reservoir (Kōkeʻe) 18 mi
See how Halenanahu Reservoir stacks up: best largemouth bass lakes in Hawaii · best peacock bass (tucunaré) lakes in Hawaii · best tilapia lakes in Hawaii · best bluegill lakes in Hawaii
More water nearby: Kauai County fishing maps (13 charts). Browse all Hawaii fishing maps or see every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.